Internal-combustion engine



June 19, 1923. N 1,4594% I A. SCHAEFER INTERNAL COMBUSTION ENGINE FiledNov. 8, 1920 2 Sheets-Sheet 1 mwx June 19, 1923.

1,459,479 A. SCHAEFER INTERNAL COMBUSTION ENGINE Filed Nov. 8, 1920 2Sheets-Sheet 2- J a. cka e tr Patented June 19, 1923.

UNITED s'raras- AnoLrn; SCHAEFER, or LEJO, CALIFORNIA.

INTERNAL-com ression nneinn.

Application filed Noveinber s, 1920'. serial no. 422,473.

T 0 aZZ whom it may concern: 7

Be it known that Lr hDOLPl-I SCHAEFER, a citizen of the UnitedStates,residing at Vallejo, in the county of Solano and State of California,have invented certain new and useful Improvements in InternaLCombustionEngines, of which the following is a specification.

My invention relates to internal combustion engines and has particularreference to an improved engine embodying a novel valve mechanismtherein.

The primary object is to provide an improved engine of the slide valvetype, in which all parts are so disposed as to give'the greatestefficiency in operation and in the production of power. With this, andsuch other objects in view as will be apparent from the description, theinvention resides in the novel construction, combination and arrangementof parts, described in the specification and illustrated in theaccompanying drawings, in which;

Fig. 1, is a side elevation of the preferred embodiment,

Fig. 2, a central vertical section thereof,

Fig. 3, a section on line 33 of Fig. 2,

Fig. 4, a section on line 44 of Fig. 3.

Fig. 5, a detail view on line 5-5 of Fig. 4,

Figs. 6 and 7, sections on the lines 6-6 and 77 of Fig. 3, respectively.

In detail, the engine comprises a base casing 1, carrying a cylinder2having the piston 3 and connecting rod 4 connected to a crank 5 disposedon the crank shaft 6 which projects through the casing 1 at its ends andcarries the fly wheel 7 and gear 8 respectively thereon. At its lowerend the cylinder extends into the casing, and its walls arediametrically slotted from the bottom, as at 9, a sufficient length andwidth to provide a clearance for the crank and connecting rod andpermitting of an efiicient splash lubrication of the piston 3 throughthe slots 9. The wall of the cylinder is provided with a downwardlyinclined intake port 10 and upwardly inclined exhaust port 11 arrangedside by side and in the same plane at the interior of the cylinder.These ports register with similarly inclined transverse perforations 12and 13 in a valve block 14 mounted on the exterior wall of the cylinder.Secured on the outer face of the valve block is a plate 15, of invertedL shape, with the short arm abutting the wall of the cylinder over thetop of the valve block, and the long arm-spaced laterally from the faceof the block to provide a casing for the slide valves 16 and'17.Plate-15 is provided with ports 18 and 19 in alignment with the intakeand exhaust passages described and is adapted to have secured thereonthe'intake andexhaust manifold (not shown). I

Journalled in the casing 1 above the crank shaft and at one side of thecylinder is a cam shaft 20, having a gear 21 mounted on its outer endin'mesh with a pinion 22 driven Cam shaft 20 from the crank shaft" gear8. carries disc cams 23 and 24 operating in yokes25 andu26 slidablymounted in guides 27 and 28 formed on the wall of the casing,

and guides 29 and 30 formed on the ends of opposed castings 31 and 32extending inwardly of the casing adjacentthe cylinder. These castingsterminate adjacentthe cylinder to provide a clearance therebetween forthe connecting rod and crank shaft operating through the adjacent slot9. Each yoke spectively. For the protection of the valves i and stemsfrom dirt and outside interference, an arcuate cover 39 is suitablysecured to the casing 1 and plate 15. The engaging walls of valve block14 and plate 15 are'provided with lubricating wells 40, and fora similarpurpose the guides 30 and 31 are provided with transverse perforations41 for splash lubrication of the yokes. I

The cams are so disposed on the shaft 20 and the ratio of the gearing issuch, that the requisite movement will be imparted to the slide valves16 and 17 :By the distribution andarrangement of the yokes and guideswith respect to the crank shaft and connecting rod, a highly efficientlubrication of all working parts is obtained.

While I have described and illustrated certain specific details whichenter into the construction and operation of the engine, I desire it tobe understood that I do not limit myself to these, but that any changesmay be made therein that will fall within the scope of the invention asclaimed.

I claim The combination in an internal combustion engine having a crankshaft, of a base casing, vertical cylinder, an extension on saidcylinder disposed within the casing and 1,0 ends of the castings, theportion of the castings: intermediate the guide flanges beingvperforated to permit lubricatlon, coacting vertical guide flanges ontheopposite Wall of th'e casing foreach set-of: guides on the castings.yokes slidably' mounted in said guides and disposed on opposite sides ofthe adjacent slot in the cylinder extension, a

cam shaftextending through said yokes,

cams carried thereby and disposed Within said yokes, vertical stemscarried by the yokes and, vertically movable slide valves connected withthe-stems,

In testimony whereof I aifiX my signature.

ADOLPH SCHAEFER'.

